41. It takes sb some time/money to do sth . 花費(fèi)某人多長時(shí)間做某事（?？迹?BR>    42. pay …for… cost spend…on….. it take …to do sth
    43. It's best for sb to do sth. 對(duì)某人來說做某事是的
    had better do sth 做某事（注意had沒有時(shí)態(tài)和人稱的變化，better后接動(dòng)詞原形）
    44. It's time for sb to do sth 是某人做某事的時(shí)候了
    45. keep (on)doing sth 堅(jiān)持做某事（?？迹?BR>    keep sb doing sth 讓某人做某事（?？迹?BR>    keep sb from doing sth 阻止某人做某事（常考）
    keep sb/sth +adj
    keep the book for 2 days 借這本書兩天（不要用borrow或lend）
    46. learn to do sth 學(xué)做某事
    learn sth from sb 向某人學(xué)習(xí)
    47. like to do/doing sth 喜歡做某事
    like sb to do sth 喜歡某人做某事
    48. need to do sth 需要做某事
    need doing sth/to be done
    need sth needn't do sth
    49. prefer to do sth rather than do sth 寧愿……而不愿……（?？迹?BR>    prefer doing sth to doing sth 喜歡做……勝過做……
    I prefer reading books to going shopping. 比起購物來，我更愛讀書。
    prefer to do sth 喜歡（愛）做某事
    50. refuse to do sth 拒絕做……